Roost Count

Bat monitoring activities are currently restricted in order to comply with government guidance on controlling the COVID-19 pandemic

For more information see our statement on COVID-19 and NBMP surveys.

Do you know of a bat roost near you, or do you have bats roosting on your property?

Help us monitor how different bat species are faring across the UK by taking part in the Roost Count. All you need to do is to count bats emerging from the roosts on two or more evenings during the summer.

It's easy to take part!

First you need to sign up to the NBMP. To do this click here.

If you are already a volunteer click here to sign in to your online recording area.

Once you are logged in click 'Volunteer for the Roost Count'.

You will then be able to add your roost. Alternatively, if you are taking over a roost which has previously been counted by another volunteer, let us know and we can transfer the details of the roost over to your account.

You can sign up to monitor roosts for any bat species. At present we are able to produce Roost Count trends for common pipistrelle, soprano pipistrelle, serotine, Natterer's bat, brown long-eared bat, lesser horseshoe bat and greater horseshoe bat as they often roost in buildings, making them easier to monitor.

A guide to taking part

Contact us at if you need help with any aspect of taking part in this survey.

May - you receive your survey pack

The pack includes survey forms and full instructions. This will be sent by email or by post depending on your preference.

If the roost is not on your own property then ensure you get permission from the roost owner and arrange dates on which you can carry out your surveys.

June* - count bats as they emerge from a roost on at least two evenings

Roost Count

Position yourself beneath the roost exit at around sunset, watch the exit carefully and count the bats out as they emerge.

Sunset times are provided so that you know what time to start your survey.

*Lesser horseshoe bat counts start in late May, while greater horseshoe bat counts take place in July.

Send us your results

Roost Count

Once you have completed your surveys, input your results online or post your completed survey form to us. Your online recording pages enable you to view and download all data you have submitted.

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